Samuel eeelee



S. KEELER.

Seed-Drill Teeth.

No. 63,056 Prend Mm 19. 1.867.

l N- PETERS, PHOTO-LITHOGRAPHIE?, WASHINGTONy D. C.

@etten tata strnt @frn IMPROVEMENT In ssnnnnttt entre.

"dige ,tlgchule ttfatrt in it tlgcsc rtttts @atout mit milking part' nt tige stmt.'

TO ALL WHO -IT MAY CONCERN:

Be it known that I, SAMUEL KEnLER, of the city of Lancaster, county of Lancaster, and State of Penn Sylvania, have invented new and useful Improvements in the rleeth and Drag-Baro` Seed-Drills; and I do hereby decla-re the following to be an'exact description thereof, reference being had to tne accompanyingdrawings, and to the letters of reference marked thereon, making a part of this specification, in which- Figure l represents a top view of the tooth and the dragbar; and i Figure 2 a side view, the red lines showing how the tooth falls back when it has struck an obstrne-t'ion.

The nature of my invention consists in the arrangement of th-e curved arm J, connected witlthe Vspiral spring M, that is located in the centre and operated b'etween the sides of the drag-bnr C, that I describe as follows: I

A represents the ordinary-shapcd seed-drill tooth; B is a single lug at top, to which the drag-bar C is. attached by an iron bolt or pivot, D, the lrag-bar C beinglnade double, of two iron bars, the ends fitting on each side of the lug B, and the bolt D vpassing through the ends of' the drag-bar, firmly connecting the drag-bar with the tooth. The drag-bar has three rivets, E F G, t0 strengthen the bars, with shoulders on the rivets to keep the bars an inch or two apart. The lowerjoint' is formed of two lugs one-ars, H H, between which the connecting curved bar J operates on a. bolt or pivot, K. "his bar J has three or fourholes at the outer end for the insertion of a wooden pin, L, and to regulate .the proper inclination ot' the tooth to operateaccording to the character of the soil. The bar J being passed up above and between the di':1gbais, the pin L is then inserted in the proper hole to shorten or lengthen the bar J, as may be required, and when the drill is in operation, and the tooth conies in contact with a stone, root, or stump, the pin L- breaks and allows the tooth to fall back and pass over the obstruction without injury to the seed-drill.. A new pin, L, is again inserted, and the drill is ready again for operation. M is a spiral spring, attached to the front of the curved arm J, passing over the rivet F, that may be made to play loosely as a roller, and operating in the cent-re and between the sides of'the drag-bar C, the lother end of the spiral spring being; permanently fastened to the front rivet G, the spring allowing the tooth to pass over any obstruction, and enabling the tooth to keep its place, thus avoidingl the use of the Wooden pin L, that may therefore be dispensed with. 'lhe spiral spring M may be used uncovcred,(as shown at figs. 1 and 2,) or enclosed in a cylindrical box, (as shown at iig. 3,) if deemed necessary.

'What I claim as my invention, and desire to secure by Letters Patent, is

The arrangement and combination of the curved arm J with the spiral springM, operating as herein described and for the purposes set forth.'

' SAMUEL KEELER.

Witnesses:

JOHN C. AMwEG, J. FRANKLIN REIGART. 

